

class Counter:


    def add(self,a,b):
        return a+b
    def jian(self,a,b):
        return a-b
    def multiplication(self,a,b):
        return a*b
    def divison(self,a,b):
        return a/b

# count1 = Counter()
# print(count1.add(1,2))
# print(count1.jian(1,2))
# print(count1.multiplication(2,3))
# print(count1.divison(3,2))